import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;

public class Demo9 {
    public static void main(String[] args) {
        try(InputStream inputStream = new FileInputStream("C:/测开/test.txt")){
            byte[] buffer = new byte[1024];
            int n = inputStream.read(buffer);
            System.out.println("n = " + n);
            for(int i = 0; i < n; i++){
                System.out.printf("%x\n",buffer[i]);
            }
        }catch(IOException e){
            e.printStackTrace();
        }
    }

}
